Hi ROOTers,
Recently I wanted to plot a THStack object, where the "all summed"
histogram was normalized to unity (or some other value). I thought it
might be interesting to add a method to handle this automatically, which
shouldn't be a problem given that a THStack owns its histos. It could
just rescale all histograms correctly after the integral of fStack->Last()
is computed.
While attempting to write this in my own code, I wanted to call the
GetStack() method to get the total histo integral. I hadn't
plotted the stack yet, so BuildStack() had not been called and GetStack
returned a NULL pointer. Could GetStack() be changed to
TObjArray *GetStack() const {
BuildStack();
return fStack;
}
?
While looking at the code, I also noticed that the following causes
problems, presumably because no check is made that fHists is non-NULL:
root [0] THStack h
root [1] h.Draw()
<TCanvas::MakeDefCanvas>: created default TCanvas with name c1
*** Break *** segmentation violation
Root >
*** Break *** segmentation violation
Minor issue, as most people won't attempt something so boring.
Thanks,
Chris
This archive was generated by hypermail 2b29 : Sat Jan 04 2003 - 23:50:57 MET